1. Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai 625021 India.
2. Department of Chemistry; Mahendra Institute of Engineering & Technology; Namakkal 637 503 Tamilnadu India.
3. Key Laboratory for Radiation Physics and Technology of Ministry of Education; Institute of Nuclear Science and Technology; Sichuan University; Chengdu China.
4. Department of Physics; Thanthai Periyar Government Institute of Technology; Vellore 608 002, Tamilnadu India.